Synthesis of Mesoporous Carbon/Iron Carbide Material and Its Hydrogen Storage Capacity†

doi:10.7503/cjcu20131101

Abstract

Abstract:

Using 1-cyanomethyl-3-methylimidazolium tetrachloridoferrate(Ⅲ) as precursor and SBA-15 as template, the mesoporous iron carbide frameworks were synthesized by the hard template method, and the structure and morphology were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and N₂ adsorption-desorption isotherms. The influences of the synthesis temperature and calcination time on the material surface area were also investigated. The results showed that mesoporous carbide with large specific surface area was obtained under 800 ℃. Moreover, uniform pore size distribution and complete structure and specific surface(517.96 m²/g) could be built with prolonging calcination time. Furthermore, hydrogen adsorption isotherm revealed that the material exhibited medium hydrogen storage capacity.

Key words: Ionic liquid, Mesoporous material, Iron carbide, Hydrogen storage (Ed.: V, Z)

CLC Number:

O647.3

TrendMD:

ZHANG Lingna, TAO Jinhui, JI Kaiji, YUE Qunfeng. Synthesis of Mesoporous Carbon/Iron Carbide Material and Its Hydrogen Storage Capacity^†[J]. Chem. J. Chinese Universities, 2014, 35(6): 1318.

Figures/Tables 8

Fig.1 Chemical structure of [MCNIm]+[FeCl4]-

Fig.2 TG analysis of the [MCNIm]+[FeCl4]-

Fig.3 N2 adsorption-desorption isotherms(A) and pore size distribution curves(B) for materials C700-4(a), C800-4(b) and C900-4(c)

Fig.4 N2 adsorption-desorption isotherms at 77 K(A—D) and corresponding pore-size distribution curves(A'—D') for materials C800-2(A, A') , C800-4(B, B'), C800-6(C, C') and C800-8(D, D')

Fig.5 XRD patterns for material C800-8(B) Partial magnified pattern of (A).

Fig.6 XPS profiles for material C800-8

Fig.7 TEM images for C/Fe3C material C800-8

Fig.8 H2 adsorption-desorption isotherms of material C800-8 at 77 and 87 K(A), heats of adsorption for material C800-8(B)

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